The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/pxa/pxa_smi.c

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    1 /*-
    2  * Copyright (c) 2006 Benno Rice.  All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   23  */
   24 
   25 #include <sys/cdefs.h>
   26 __FBSDID("$FreeBSD: releng/8.0/sys/arm/xscale/pxa/pxa_smi.c 179595 2008-06-06 05:08:09Z benno $");
   27 
   28 #include <sys/param.h>
   29 #include <sys/systm.h>
   30 #include <sys/bus.h>
   31 #include <sys/kernel.h>
   32 #include <sys/module.h>
   33 #include <sys/malloc.h>
   34 #include <sys/rman.h>
   35 #include <sys/timetc.h>
   36 #include <machine/bus.h>
   37 #include <machine/intr.h>
   38 
   39 #include <vm/vm.h>
   40 #include <vm/pmap.h>
   41 
   42 #include <arm/xscale/pxa/pxavar.h>
   43 #include <arm/xscale/pxa/pxareg.h>
   44 
   45 MALLOC_DEFINE(M_PXASMI, "PXA SMI", "Data for static memory interface devices.");
   46 
   47 struct pxa_smi_softc {
   48         struct resource *ps_res[1];
   49         struct rman     ps_mem;
   50         bus_space_tag_t ps_bst;
   51         bus_addr_t      ps_base;
   52 };
   53 
   54 struct smi_ivars {
   55         struct resource_list    smid_resources;
   56         bus_addr_t              smid_mem;
   57 };
   58 
   59 static struct resource_spec pxa_smi_spec[] = {
   60         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
   61         { -1, 0 }
   62 };
   63 
   64 static int      pxa_smi_probe(device_t);
   65 static int      pxa_smi_attach(device_t);
   66 
   67 static int      pxa_smi_print_child(device_t, device_t);
   68 
   69 static int      pxa_smi_read_ivar(device_t, device_t, int, uintptr_t *);
   70 
   71 static struct resource *        pxa_smi_alloc_resource(device_t, device_t,
   72                                     int, int *, u_long, u_long, u_long, u_int);
   73 static int                      pxa_smi_release_resource(device_t, device_t,
   74                                     int, int, struct resource *);
   75 static int                      pxa_smi_activate_resource(device_t, device_t,
   76                                     int, int, struct resource *);
   77 
   78 static void     pxa_smi_add_device(device_t, const char *, int);
   79 
   80 static int
   81 pxa_smi_probe(device_t dev)
   82 {
   83 
   84         if (resource_disabled("smi", device_get_unit(dev)))
   85                 return (ENXIO);
   86 
   87         device_set_desc(dev, "Static Memory Interface");
   88         return (0);
   89 }
   90 
   91 static int
   92 pxa_smi_attach(device_t dev)
   93 {
   94         int             error, i, dunit;
   95         const char      *dname;
   96         struct          pxa_smi_softc *sc;
   97 
   98         sc = (struct pxa_smi_softc *)device_get_softc(dev);
   99 
  100         error = bus_alloc_resources(dev, pxa_smi_spec, sc->ps_res);
  101         if (error) {
  102                 device_printf(dev, "could not allocate resources\n");
  103                 return (ENXIO);
  104         }
  105 
  106         sc->ps_mem.rm_type = RMAN_ARRAY;
  107         sc->ps_mem.rm_descr = device_get_nameunit(dev);
  108         if (rman_init(&sc->ps_mem) != 0)
  109                 panic("pxa_smi_attach: failed to init mem rman");
  110         if (rman_manage_region(&sc->ps_mem, 0, PXA2X0_CS_SIZE * 6) != 0)
  111                 panic("pxa_smi_attach: failed ot set up mem rman");
  112 
  113         sc->ps_bst = base_tag;
  114         sc->ps_base = rman_get_start(sc->ps_res[0]);
  115 
  116         i = 0;
  117         while (resource_find_match(&i, &dname, &dunit, "at",
  118             device_get_nameunit(dev)) == 0) {
  119                 pxa_smi_add_device(dev, dname, dunit);
  120         }
  121 
  122         bus_generic_probe(dev);
  123         bus_generic_attach(dev);
  124 
  125         return (0);
  126 }
  127 
  128 static int
  129 pxa_smi_print_child(device_t dev, device_t child)
  130 {
  131         struct  smi_ivars *smid;
  132         int     retval;
  133 
  134         smid = (struct smi_ivars *)device_get_ivars(child);
  135         if (smid == NULL) {
  136                 device_printf(dev, "unknown device: %s\n",
  137                     device_get_nameunit(child));
  138                 return (0);
  139         }
  140 
  141         retval = 0;
  142 
  143         retval += bus_print_child_header(dev, child);
  144 
  145         retval += resource_list_print_type(&smid->smid_resources, "at mem",
  146             SYS_RES_MEMORY, "%#lx");
  147         retval += resource_list_print_type(&smid->smid_resources, "irq",
  148             SYS_RES_IRQ, "%ld");
  149 
  150         retval += bus_print_child_footer(dev, child);
  151 
  152         return (retval);
  153 }
  154 
  155 static int
  156 pxa_smi_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  157 {
  158         struct  pxa_smi_softc *sc;
  159         struct  smi_ivars *smid;
  160 
  161         sc = device_get_softc(dev);
  162         smid = device_get_ivars(child);
  163 
  164         switch (which) {
  165         case SMI_IVAR_PHYSBASE:
  166                 *((bus_addr_t *)result) = smid->smid_mem;
  167                 break;
  168 
  169         default:
  170                 return (ENOENT);
  171         }
  172 
  173         return (0);
  174 }
  175 
  176 static struct resource *
  177 pxa_smi_alloc_resource(device_t dev, device_t child, int type, int *rid,
  178     u_long start, u_long end, u_long count, u_int flags)
  179 {
  180         struct  pxa_smi_softc *sc;
  181         struct  smi_ivars *smid;
  182         struct  resource *rv;
  183         struct  resource_list *rl;
  184         struct  resource_list_entry *rle;
  185         int     needactivate;
  186 
  187         sc = (struct pxa_smi_softc *)device_get_softc(dev);
  188         smid = (struct smi_ivars *)device_get_ivars(child);
  189         rl = &smid->smid_resources;
  190 
  191         if (type == SYS_RES_IOPORT)
  192                 type = SYS_RES_MEMORY;
  193 
  194         rle = resource_list_find(rl, type, *rid);
  195         if (rle == NULL)
  196                 return (NULL);
  197         if (rle->res != NULL)
  198                 panic("pxa_smi_alloc_resource: resource is busy");
  199 
  200         needactivate = flags & RF_ACTIVE;
  201         flags &= ~RF_ACTIVE;
  202 
  203         switch (type) {
  204         case SYS_RES_MEMORY:
  205                 rv = rman_reserve_resource(&sc->ps_mem, rle->start, rle->end,
  206                     rle->count, flags, child);
  207                 if (rv == NULL)
  208                         return (NULL);
  209                 rle->res = rv;
  210                 rman_set_rid(rv, *rid);
  211                 rman_set_bustag(rv, sc->ps_bst);
  212                 rman_set_bushandle(rv, rle->start);
  213                 if (needactivate) {
  214                         if (bus_activate_resource(child, type, *rid, rv) != 0) {
  215                                 rman_release_resource(rv);
  216                                 return (NULL);
  217                         }
  218                 }
  219 
  220                 break;
  221 
  222         case SYS_RES_IRQ:
  223                 rv = bus_alloc_resource(dev, type, rid, rle->start, rle->end,
  224                     rle->count, flags);
  225                 if (rv == NULL)
  226                         return (NULL);
  227                 if (needactivate) {
  228                         if (bus_activate_resource(child, type, *rid, rv) != 0) {
  229                                 bus_release_resource(dev, type, *rid, rv);
  230                                 return (NULL);
  231                         }
  232                 }
  233 
  234                 break;
  235 
  236         default:
  237                 return (NULL);
  238         }
  239 
  240         return (rv);
  241 }
  242 
  243 static int
  244 pxa_smi_release_resource(device_t dev, device_t child, int type, int rid,
  245     struct resource *r)
  246 {
  247         struct  smi_ivars *smid;
  248         struct  resource_list *rl;
  249         struct  resource_list_entry *rle;
  250 
  251         if (type == SYS_RES_IRQ)
  252                 return (bus_release_resource(dev, SYS_RES_IRQ, rid, r));
  253 
  254         smid = (struct smi_ivars *)device_get_ivars(child);
  255         rl = &smid->smid_resources;
  256 
  257         if (type == SYS_RES_IOPORT)
  258                 type = SYS_RES_MEMORY;
  259 
  260         rle = resource_list_find(rl, type, rid);
  261         if (rle == NULL)
  262                 panic("pxa_smi_release_resource: can't find resource");
  263         if (rle->res == NULL)
  264                 panic("pxa_smi_release_resource: resource entry not busy");
  265 
  266         rman_release_resource(rle->res);
  267         rle->res = NULL;
  268 
  269         return (0);
  270 }
  271 
  272 static int
  273 pxa_smi_activate_resource(device_t dev, device_t child, int type, int rid,
  274     struct resource *r)
  275 {
  276         struct  pxa_smi_softc *sc;
  277 
  278         sc = (struct pxa_smi_softc *)device_get_softc(dev);
  279 
  280         if (type == SYS_RES_IRQ)
  281                 return (bus_activate_resource(dev, SYS_RES_IRQ, rid, r));
  282 
  283         rman_set_bushandle(r, (bus_space_handle_t)pmap_mapdev(rman_get_start(r),
  284             rman_get_size(r)));
  285         return (rman_activate_resource(r));
  286 }
  287 
  288 static device_method_t pxa_smi_methods[] = {
  289         DEVMETHOD(device_probe, pxa_smi_probe),
  290         DEVMETHOD(device_attach, pxa_smi_attach),
  291 
  292         DEVMETHOD(bus_print_child, pxa_smi_print_child),
  293 
  294         DEVMETHOD(bus_read_ivar, pxa_smi_read_ivar),
  295 
  296         DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
  297 
  298         DEVMETHOD(bus_alloc_resource, pxa_smi_alloc_resource),
  299         DEVMETHOD(bus_release_resource, pxa_smi_release_resource),
  300         DEVMETHOD(bus_activate_resource, pxa_smi_activate_resource),
  301 
  302         {0, 0}
  303 };
  304 
  305 static driver_t pxa_smi_driver = {
  306         "smi",
  307         pxa_smi_methods,
  308         sizeof(struct pxa_smi_softc),
  309 };
  310 
  311 static devclass_t pxa_smi_devclass;
  312 
  313 DRIVER_MODULE(smi, pxa, pxa_smi_driver, pxa_smi_devclass, 0, 0);
  314 
  315 static void
  316 pxa_smi_add_device(device_t dev, const char *name, int unit)
  317 {
  318         device_t        child;
  319         int             start, count;
  320         struct          smi_ivars *ivars;
  321 
  322         ivars = (struct smi_ivars *)malloc(
  323             sizeof(struct smi_ivars), M_PXASMI, M_WAITOK);
  324         if (ivars == NULL)
  325                 return;
  326 
  327         child = device_add_child(dev, name, unit);
  328         if (child == NULL) {
  329                 free(ivars, M_PXASMI);
  330                 return;
  331         }
  332 
  333         device_set_ivars(child, ivars);
  334         resource_list_init(&ivars->smid_resources);
  335 
  336         start = 0;
  337         count = 0;
  338         resource_int_value(name, unit, "mem", &start);
  339         resource_int_value(name, unit, "size", &count);
  340         if (start > 0 || count > 0) {
  341                 resource_list_add(&ivars->smid_resources, SYS_RES_MEMORY, 0,
  342                     start, start + count, count);
  343                 ivars->smid_mem = (bus_addr_t)start;
  344         }
  345 
  346         start = -1;
  347         count = 0;
  348         resource_int_value(name, unit, "irq", &start);
  349         if (start > -1)
  350                 resource_list_add(&ivars->smid_resources, SYS_RES_IRQ, 0, start,
  351                      start, 1);
  352 
  353         if (resource_disabled(name, unit))
  354                 device_disable(child);
  355 }

Cache object: bfe3ec4c9802dfe122c07b029ff22b32


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